/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.icanci.loopstack.damc.core.dynamic;

import java.lang.management.ManagementFactory;

import com.sun.tools.attach.VirtualMachine;

/**
 * @author icanci
 * @since 1.0 Created in 2025/05/19 13:09
 */
public class AttachTool {
    /**
     * Attach Pool
     * 
     * @throws Exception Exception
     */
    public static void attachAgent() throws Exception {
        if (DynamicAgent.inited()) {
            return;
        }

        VirtualMachine vm = VirtualMachine.attach(getJvmPid());
        vm.loadAgent(String.valueOf(System.getProperties().get(DamcCoreConstant.DAMC_ARGS_AGENT_PATH_KEY)));
        vm.detach();
    }

    private static String getJvmPid() {
        // 获取 JVM 的进程名称（格式：pid@hostname）
        String jvmName = ManagementFactory.getRuntimeMXBean().getName();
        // 解析 PID
        return jvmName.split("@")[0];
    }
}
